JPS56140419A - Diagnostic method for fault of digital control device - Google Patents

Diagnostic method for fault of digital control device

Info

Publication number
JPS56140419A
JPS56140419A JP4347380A JP4347380A JPS56140419A JP S56140419 A JPS56140419 A JP S56140419A JP 4347380 A JP4347380 A JP 4347380A JP 4347380 A JP4347380 A JP 4347380A JP S56140419 A JPS56140419 A JP S56140419A
Authority
JP
Japan
Prior art keywords
feedback quantity
control object
value
task
detecting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4347380A
Other languages
Japanese (ja)
Inventor
Tsutomu Omae
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4347380A priority Critical patent/JPS56140419A/en
Publication of JPS56140419A publication Critical patent/JPS56140419A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE:To detect the abnormal state easily, by judging the control object or the detecting device to be abnormal if the difference between the estimated value and the feedback quantity is larger than the reference value, in the digital operation processing device such as a microcomputer. CONSTITUTION:Microcomputer 10 generates an interrupting pulse at every fixed period TS, and targeted value Xi and feedback quantity Xf are taken in by the start of the task. Operation quantity U is calculated according to the control algorithm determined on the basis of these values and is output to control object 12, and the task is terminated. In this case, change components DELTAU of operation quantity U and the value of feedback quantity Xf are used to calculate the estimated value of feedback quantity Xf at the next interrupting pulse generation time after the completion of execution of the interruption processing task of interruption period TS. If difference E between estimated value Xf and feedback quantity Xf is larger than reference value Eo as the result, it is decided that the abnormal state occurs in control object 12 or detecting device 14, and thus, control object 12 or detecting device 14 is judged abnormal without providing a fault detecting means.
JP4347380A 1980-04-04 1980-04-04 Diagnostic method for fault of digital control device Pending JPS56140419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4347380A JPS56140419A (en) 1980-04-04 1980-04-04 Diagnostic method for fault of digital control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4347380A JPS56140419A (en) 1980-04-04 1980-04-04 Diagnostic method for fault of digital control device

Publications (1)

Publication Number Publication Date
JPS56140419A true JPS56140419A (en) 1981-11-02

Family

ID=12664684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4347380A Pending JPS56140419A (en) 1980-04-04 1980-04-04 Diagnostic method for fault of digital control device

Country Status (1)

Country Link
JP (1) JPS56140419A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189035A (en) * 1984-10-08 1986-05-07 昭和鋼機株式会社 Manufacture of composite panel
FR2616931A1 (en) * 1987-06-22 1988-12-23 Renault DEVICE FOR MANAGING AN ELECTRO-HYDRAULIC PRESSURE CONTROL
CN115400247A (en) * 2021-05-28 2022-11-29 宁波方太厨具有限公司 Pulse sterilizer work monitoring method and sterilizing cabinet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52134981A (en) * 1976-05-06 1977-11-11 Hitachi Ltd Controller abnormality detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52134981A (en) * 1976-05-06 1977-11-11 Hitachi Ltd Controller abnormality detector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189035A (en) * 1984-10-08 1986-05-07 昭和鋼機株式会社 Manufacture of composite panel
FR2616931A1 (en) * 1987-06-22 1988-12-23 Renault DEVICE FOR MANAGING AN ELECTRO-HYDRAULIC PRESSURE CONTROL
EP0296958A1 (en) * 1987-06-22 1988-12-28 Regie Nationale Des Usines Renault Device for regulating a pressure electrohydraulic actuator
CN115400247A (en) * 2021-05-28 2022-11-29 宁波方太厨具有限公司 Pulse sterilizer work monitoring method and sterilizing cabinet
CN115400247B (en) * 2021-05-28 2024-02-20 宁波方太厨具有限公司 Pulse sterilizer working monitoring method and sterilizer

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